NEET Physics: Young's modulus Practice Questions
15 free multiple-choice questions on Young's modulus (Properties of Solids and Liquids) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. If a material has a very high Young's Modulus, what can be inferred about its mechanical behavior?
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Correct answer: C — It is very stiff and resists deformation significantly
A high Young's Modulus indicates that a large amount of stress is required to produce a small amount of strain, meaning the material is very stiff and resists deformation strongly.
Q2. If two materials have the same Young's modulus, it means they have the same:
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Correct answer: C — elastic properties
Since Young's modulus defines the linear elastic relationship between stress and strain, having the same modulus implies identical elastic characteristics for that deformation type.
Q3. Which of the following statements correctly defines Young's modulus (Y) for a material subjected to stress and strain in the elastic limit?
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Correct answer: A — Y is the ratio of stress to strain.
Young's modulus (Y) is defined as the ratio of longitudinal stress (σ) to longitudinal strain (ε) within the elastic limit. The formula is Y = σ/ ε.
Q4. Young's modulus of elasticity primarily quantifies which property of a material?
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Correct answer: A — Resistance to deformation under tensile load
Young's modulus (Y) measures the material's resistance to elastic deformation (stretching or compression) when subjected to a tensile or compressive force.
Q5. If a material has a high Young's modulus, it implies that the material is:
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Correct answer: D — Highly resistant to elastic deformation
A higher Young's modulus signifies greater resistance to deformation under stress, meaning the material is stiffer or more rigid.
Q6. When a material is subjected to a tensile force, the resulting deformation is primarily measured by:
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Correct answer: A — the strain
Strain is the measure of deformation relative to the original length. In the context of Young's modulus, strain is the quantity that relates stress and modulus.
Q7. Young's modulus of an elastic material is a measure of its resistance to deformation when subjected to a tensile force. This modulus is mathematically defined as the ratio of which two quantities?
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Correct answer: A — Stress and strain
Young's modulus (or modulus of elasticity) is fundamentally defined as the ratio of tensile stress (σ) to longitudinal strain (ε), i.e., Y = σ/ε.
Q8. If the stress applied to a material is doubled while keeping the strain constant, what happens to Young's modulus?
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Correct answer: A — It is doubled
Young's modulus (Y) is directly proportional to stress (σ) when strain (ε) is constant (Y = σ/ε). If σ is doubled and ε is constant, Y must also be doubled.
Q9. If a material exhibits a linear elastic response, what relationship governs the stress and strain experienced by the material within its elastic limit?
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Correct answer: A — Stress is directly proportional to strain
For linear elastic materials, the stress (σ) applied is directly proportional to the strain (ε) experienced, and this proportionality constant is Young's Modulus (E). Thus, σ= Eε (Stress is directly proportional to strain).
Q10. A material with a low Young's modulus will exhibit:
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Correct answer: A — large elastic deformation under small load
A low modulus indicates that a small applied stress results in a large strain, meaning the material is easily deformable (less stiff).
Q11. The unit of Young's modulus is equivalent to the unit of which physical quantity?
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Correct answer: A — Pascal (N/m²)
Since Young's modulus is the ratio of stress (Force/Area) to strain (dimensionless), its unit is the same as the unit of stress, which is the Pascal (N/m²).
Q12. When the stress applied to a material exceeds its elastic limit, the material begins to undergo:
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Correct answer: C — Plastic deformation
The elastic limit defines the maximum stress a material can endure without permanent deformation. Once this limit is exceeded, the material enters the region of plastic (permanent) deformation.
Q13. In the elastic limit of a material, the relationship between stress and strain is generally described by which law?
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Correct answer: C — Hooke's Law
Within the elastic limit, the stress applied is directly proportional to the strain produced, which is the statement of Hooke's Law (σ= Yε).
Q14. A material with a higher Young's modulus is considered to be:
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Correct answer: A — More rigid
Young's modulus is a measure of stiffness. A higher value indicates that the material requires a greater stress to produce a given amount of strain, meaning it is more rigid.
Q15. Which of the following scenarios best describes a material having a high Young's modulus?
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Correct answer: D — It is very stiff and resists deformation
A high Young's modulus indicates that the material resists changes in shape (deformation) strongly when stress is applied, meaning it is very stiff.
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